question_answer 1)
Formula which represents a simple ratio of atoms of different elements present in a molecule of the substance is called
A)
Molecular formula done
clear
B)
Empirical formula done
clear
C)
Structural formula done
clear
D)
Condensed formula done
clear
View Solution play_arrow
question_answer 2)
Actual number of atoms of different elements present in a molecule of a compound is given by
A)
Molecular formula done
clear
B)
Structural formula done
clear
C)
Empirical formula done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 3)
A compound contains \[C=90%\] and \[H=10%\]. Empirical formula of the compound is [NCERT 1976; EAMCET 1978]
A)
\[{{C}_{3}}{{H}_{10}}\] done
clear
B)
\[C{{H}_{2}}\] done
clear
C)
\[{{C}_{3}}{{H}_{2}}\] done
clear
D)
\[{{C}_{3}}{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 4)
An organic compound contains \[C=36%\] \[H=6%\] and rest oxygen. Its Empirical formula is
A)
\[C{{H}_{2}}O\] done
clear
B)
\[{{C}_{2}}{{H}_{3}}{{O}_{3}}\] done
clear
C)
\[C{{H}_{2}}{{O}_{2}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 5)
Empirical formula of a compound is \[C{{H}_{2}}O\] and its vapour density is 30. Molecular formula of the compound is [MP PMT 1993; AIIMS 1998; CBSE PMT 2000; KCET (Med.) 2000; Pb. PMT 2000]
A)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}O\] done
clear
D)
\[C{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 6)
An organic compound on analysis gave C = 48 gm, H = 8 gm and N = 56 gm. Volume of 1.0 g of the compound was found to be 200 ml at NTP. Molecular formula of the compound is [MP PET 1986]
A)
\[{{C}_{4}}{{H}_{8}}{{N}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}{{N}_{2}}\] done
clear
C)
\[{{C}_{12}}{{H}_{24}}{{N}_{12}}\] done
clear
D)
\[{{C}_{16}}{{H}_{32}}{{N}_{16}}\] done
clear
View Solution play_arrow
question_answer 7)
Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is [MP PET 1993]
A)
350 done
clear
B)
470 done
clear
C)
560 done
clear
D)
940 done
clear
View Solution play_arrow
question_answer 8)
Which element is estimated by Carius method
A)
Carbon done
clear
B)
Hydrogen done
clear
C)
Halogen done
clear
D)
Nitrogen done
clear
View Solution play_arrow
question_answer 9)
On complete combustion 1.4 g hydrocarbon gave 1.8 g water. Empirical formula of the hydrocarbon is
A)
\[CH\] done
clear
B)
\[C{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}\] done
clear
D)
\[C{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 10)
In the estimation of sulphur organic compound on treating with conc. \[HN{{O}_{3}}\] is converted to
A)
\[S{{O}_{2}}\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[S{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 11)
In Carius method 0.099 g organic compound gave 0.287 g \[AgCl\]. The percentage of chlorine in the compound will be
A)
28.6 done
clear
B)
71.7 done
clear
C)
35.4 done
clear
D)
64.2 done
clear
View Solution play_arrow
question_answer 12)
0.24 g of an organic compound gave 0.22 g \[C{{O}_{2}}\] on complete combustion. If it contains 1.66 % hydrogen, then the percentage of C and O will be [MP PET 1986]
A)
12.5 and 36.6 done
clear
B)
25 and 75 done
clear
C)
25 and 36.6 done
clear
D)
25 and 80 done
clear
View Solution play_arrow
question_answer 13)
An organic compound contains \[C=74.0%,\] \[H=8.65%\] and \[N=17.3%\]. Its Empirical formula is [MP PMT 1986]
A)
\[{{C}_{5}}{{H}_{8}}N\] done
clear
B)
\[{{C}_{10}}{{H}_{12}}N\] done
clear
C)
\[{{C}_{5}}{{H}_{7}}N\] done
clear
D)
\[{{C}_{10}}{{H}_{14}}N\] done
clear
View Solution play_arrow
question_answer 14)
An appropriate method for molecular weight determination of chloroform is
A)
Regnault's method done
clear
B)
Diffusion method done
clear
C)
Vapour pressure method done
clear
D)
Victor Meyer's method done
clear
View Solution play_arrow
question_answer 15)
Molecular weight of an organic acid is given by
A)
Equivalent weight ´ basicity done
clear
B)
\[\frac{\text{Equivalent weight}}{\text{Basicity}}\] done
clear
C)
\[\frac{\text{Basicity}}{\text{Equivalent weight}}\] done
clear
D)
Equivalent weight ´ valency done
clear
View Solution play_arrow
question_answer 16)
If two compounds have the same empirical formula but different molecular formulae they must have [IIT-JEE 1987; Kurukshetra CEE 1998]
A)
Different percentage composition done
clear
B)
Different molecular weight done
clear
C)
Same viscosity done
clear
D)
Same vapour density done
clear
View Solution play_arrow
question_answer 17)
Empirical formula of a compound is \[{{C}_{2}}{{H}_{5}}O\] and its molecular weight is 90. Molecular formula of the compound is [NCERT 1971]
A)
\[{{C}_{2}}{{H}_{5}}O\] done
clear
B)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
C)
\[{{C}_{4}}{{H}_{10}}{{O}_{2}}\] done
clear
D)
\[{{C}_{5}}{{H}_{14}}O\] done
clear
View Solution play_arrow
question_answer 18)
60 g of a compound on analysis gave \[C=24\text{ }g,\] \[H=4\text{ }g\] and O = 32 g. Its Empirical formula is [CPMT 1971, 81]
A)
\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\] done
clear
B)
\[{{C}_{2}}{{H}_{2}}O\] done
clear
C)
\[C{{H}_{2}}{{O}_{2}}\] done
clear
D)
\[C{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 19)
An organic compound contains \[C=38.8%,\] \[H=16%\] and \[N=45.2%\]. Empirical formula of the compound is [CPMT 1973, 83]
A)
\[C{{H}_{3}}N{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}CN\] done
clear
C)
\[{{C}_{2}}{{H}_{5}}CN\] done
clear
D)
\[C{{H}_{2}}{{(NH)}_{2}}\] done
clear
View Solution play_arrow
question_answer 20)
In Kjeldahl's method for the estimation of nitrogen, the formula used is
A)
\[%N=\frac{1.4\text{ }V\text{ }W}{N}\] done
clear
B)
\[%N=\frac{1.4\text{ }N\text{ }W}{V}\] done
clear
C)
\[%N=\frac{V\text{ }N\text{ }W}{1.8}\] done
clear
D)
\[%N=\frac{1.4\text{ }V\text{ }N}{W}\] done
clear
View Solution play_arrow
question_answer 21)
An organic compound on analysis gave the following results : C = 54.5%, O = 36.4%, H = 9.1%. The Empirical formula of the compound is [CPMT 1977; KCET 1998; MP PET 2003; UPSEAT 2004; IIT-JEE (Screening) 2004]
A)
\[C{{H}_{3}}O\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}O\] done
clear
C)
\[{{C}_{3}}{{H}_{4}}O\] done
clear
D)
\[{{C}_{4}}{{H}_{8}}O\] done
clear
View Solution play_arrow
question_answer 22)
An organic compound gave C = 92.31% and \[H=7.69%\]. If molecular weight of the compound is 78, its molecular formula is
A)
\[{{C}_{6}}{{H}_{6}}\] done
clear
B)
\[{{C}_{7}}{{H}_{7}}\] done
clear
C)
\[{{C}_{6}}{{H}_{18}}\] done
clear
D)
\[{{C}_{8}}{{H}_{20}}\] done
clear
View Solution play_arrow
question_answer 23)
An organic compound gave the following results \[C=53.3%,\text{ }H=15.6,\text{ }N=31.1%,\] mol. wt. = 45, What is molecular formula of the compound?
A)
\[{{C}_{2}}{{H}_{5}}{{N}_{2}}\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}N\] done
clear
C)
\[{{C}_{2}}{{H}_{7}}N\] done
clear
D)
\[{{C}_{2}}{{H}_{6}}N\] done
clear
View Solution play_arrow
question_answer 24)
A compound gave 80% carbon and 20 % hydrogen on analysis. The compound is possibly [MADT Bihar 1984; MP PMT 1986]
A)
\[{{C}_{6}}{{H}_{6}}\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}\] done
clear
D)
\[CHC{{l}_{3}}\] done
clear
View Solution play_arrow
question_answer 25)
A compound has 50% carbon, 50% oxygen and approximate molecular weight is 290. Its molecular formula is [MP PET 1995]
A)
CO done
clear
B)
\[{{C}_{4}}{{O}_{3}}\] done
clear
C)
\[{{C}_{12}}{{O}_{9}}\] done
clear
D)
\[{{C}_{3}}{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 26)
On analysis, a saturated hydrocarbon is found to contain 83.70 percent carbon and 16.30% hydrogen. The empirical formula will be (at. wt. of C=12, at. wt. of H = 1) [MP PMT 1995]
A)
\[{{C}_{3}}{{H}_{6}}\] done
clear
B)
\[{{C}_{3}}{{H}_{8}}\] done
clear
C)
\[{{C}_{3}}{{H}_{7}}\] done
clear
D)
\[{{C}_{6}}{{H}_{12}}\] done
clear
View Solution play_arrow
question_answer 27)
An organic compound has C = 60%, H = 13.3% and O = 26.7%. Its empirical formula will be
A)
\[{{C}_{3}}{{H}_{6}}O\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}{{O}_{2}}\] done
clear
C)
\[{{C}_{4}}{{H}_{8}}{{O}_{2}}\] done
clear
D)
\[{{C}_{3}}{{H}_{8}}O\] done
clear
View Solution play_arrow
question_answer 28)
A hydrocarbon has C=85.72% and remaining H. The hydrocarbon is [MP PET 1996]
A)
\[{{C}_{2}}{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}\] done
clear
C)
\[{{C}_{2}}{{H}_{2}}\] done
clear
D)
\[C{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 29)
64 gm of an organic compound contains 24 gm of carbon, 8 gm of hydrogen and the rest oxygen. The empirical formula of the compound is [MP PMT 1996]
A)
\[C{{H}_{2}}O\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}O\] done
clear
C)
\[C{{H}_{4}}O\] done
clear
D)
\[{{C}_{2}}{{H}_{8}}{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 30)
An organic compound contains C, H and O in the proportion of 6 : 1 : 8 by weight, respectively. Its vapour density is 30. Its molecular formula will be
A)
\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\] done
clear
B)
\[C{{H}_{4}}O\] done
clear
C)
\[C{{H}_{2}}O\] done
clear
D)
\[{{C}_{3}}HO\] done
clear
View Solution play_arrow
question_answer 31)
The vapour density of the methyl ester of an organic monocarboxylic acid is 37. What is the molecular weight of the acid
A)
46 done
clear
B)
60 done
clear
C)
70 done
clear
D)
74 done
clear
View Solution play_arrow
question_answer 32)
Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is [MP PET 1997; EAMCET 1998; JIPMER 2002]
A)
CH done
clear
B)
\[C{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}\] done
clear
D)
\[C{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 33)
An organic compound with C = 40% and H = 6.7% will have the empirical formula [MP PET 1999; JIPMER 2002]
A)
\[C{{H}_{2}}\] done
clear
B)
\[C{{H}_{2}}O\] done
clear
C)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
D)
\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 34)
Which of the following relations gives the value of n = [Bihar MEE 1996]
A)
\[\frac{\text{Moleculer Mass}}{\text{Atomic Mass}}\] done
clear
B)
\[\frac{\text{Molecular Mass}}{\text{Empirical Mass}}\] done
clear
C)
\[\frac{\text{Empirical Mass}}{\text{Molecular Mass}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 35)
An organic compound containing C, H and N gave following analysis : C = 40%, H = 13.33% and N = 46.67%. Its empirical formula would be [CBSE PMT 1998, 99; AFMC 2000; KCET 2002; Pb. PMT 2004]
A)
\[{{C}_{2}}{{H}_{7}}{{N}_{2}}\] done
clear
B)
\[C{{H}_{5}}N\] done
clear
C)
\[C{{H}_{4}}N\] done
clear
D)
\[{{C}_{2}}{{H}_{7}}N\] done
clear
View Solution play_arrow
question_answer 36)
If a compound on analysis was found to contain C = 18.5%, H = 1.55%, Cl = 55.04% and O = 24.81%, then its empirical formula is [AIIMS 1998]
A)
\[CHClO\] done
clear
B)
\[C{{H}_{2}}ClO\] done
clear
C)
\[{{C}_{2}}{{H}_{2}}OCl\] done
clear
D)
\[ClC{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 37)
An organic compound has % of C and % of H in the ratio 6 : 1 and % of C and % of O in the ratio 3 : 4. The compound is [Roorkee 1999]
A)
\[HCHO\] done
clear
B)
\[C{{H}_{3}}OH\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
D)
\[{{H}_{2}}\to {{H}^{\bullet }}+{{H}^{\bullet }}\] done
clear
View Solution play_arrow
question_answer 38)
0.2595g of an organic substance in a quantitative analysis yielded 0.35 g of the barium sulphate. The percentage of sulphur in the substance is [CPMT 2000; AFMC 2001; Pb. CET 2000]
A)
18.52g done
clear
B)
182.2 g done
clear
C)
17. 5 g done
clear
D)
175.2g done
clear
View Solution play_arrow
question_answer 39)
In kjeldahl?s method, \[CuS{{O}_{4}}\] acts as [AFMC 2001]
A)
Oxidising agent done
clear
B)
Reducing agent done
clear
C)
Hydrolysing agent done
clear
D)
Catalytic agent done
clear
View Solution play_arrow
question_answer 40)
In the qualitative analysis of nitrate a brown ring is formed due to the formation of [AMU 2001]
A)
\[N{{O}_{2}}\] done
clear
B)
\[FeS{{O}_{4}}N{{O}_{2}}\] done
clear
C)
\[{{N}_{2}}O.FeS{{O}_{4}}\] done
clear
D)
\[FeS{{O}_{4}}.NO\] done
clear
View Solution play_arrow
question_answer 41)
Percentage composition of an organic compounds is as follows: C = 10.06, H = 0.84, Cl = 89.10. Which of the following corresponds to its molecular formula if the vapour density is 60.0 [AMU 2001]
A)
\[C{{H}_{2}}C{{l}_{2}}\] done
clear
B)
\[CHC{{l}_{3}}\] done
clear
C)
\[C{{H}_{3}}Cl\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 42)
The percentage of \[{{N}_{2}}\] in urea is about [KCET (Med.) 2001]
A)
18.05 done
clear
B)
28.29 done
clear
C)
46.66 done
clear
D)
85.56 done
clear
View Solution play_arrow
question_answer 43)
A compound of carbon hydrogen and nitrogen contains three elements in the respective ratio of 9 : 1 : 35 grams. The Empirical formula for the compound is [DCE 2001]
A)
\[{{C}_{2}}{{H}_{4}}N\] done
clear
B)
\[{{C}_{3}}{{H}_{4}}N\] done
clear
C)
\[{{C}_{3}}{{H}_{6}}N\] done
clear
D)
\[{{C}_{2}}{{H}_{6}}N\] done
clear
View Solution play_arrow
question_answer 44)
Which of the following is the best scientific method to test the presence of water in a liquid [JIPMER 2001]
A)
Use of anhydrous copper sulphate done
clear
B)
Use of litmus paper done
clear
C)
Taste done
clear
D)
Smell done
clear
View Solution play_arrow
question_answer 45)
Chromatography is a valuable method for the separation, isolation, purification and identification of the constituents of a mixture and it is based on general principle of [Kerala (Med.) 2002]
A)
Phase rule done
clear
B)
Phase distribution done
clear
C)
Interphase separation done
clear
D)
Phase operation done
clear
View Solution play_arrow
question_answer 46)
To differentiate between carbon-12, carbon-13 and carbon-14, the instrument that you would use in [Kerala (Engg.) 2002]
A)
Infra-red spectrometer done
clear
B)
Atomic absorption spectrometer done
clear
C)
Mass spectrometer done
clear
D)
Ultraviolet spectrometer done
clear
View Solution play_arrow
question_answer 47)
Chromatography is used for the purification of [KCET 2002]
A)
Solids done
clear
B)
liquids done
clear
C)
Gases done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 48)
An organic compound has been found to possess the Empirical formula \[C{{H}_{2}}O\] and molecular weight 90. The molecular formula of it is \[(C=12,\,\,H=1,\,\text{and}\,\,O=16)\] [CPMT 2000; MP PET 2002]
A)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
B)
\[C{{H}_{2}}O\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}{{O}_{2}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 49)
An organic compound containing carbon hydrogen and oxygen contains 52.20% carbon and 13.04% hydrogen. Vapour density of the compound is 23. Its molecular formula will be [MP PMT 2002]
A)
\[{{C}_{2}}{{H}_{6}}O\] done
clear
B)
\[{{C}_{3}}{{H}_{8}}O\] done
clear
C)
\[{{C}_{4}}{{H}_{8}}O\] done
clear
D)
\[{{C}_{5}}{{H}_{10}}O\] done
clear
View Solution play_arrow
question_answer 50)
Lassaigne?s test is used to detect [Kerala (Engg.) 2002]
A)
Nitrogen and halogens done
clear
B)
Sodium and halogens done
clear
C)
Halogens and sulphur done
clear
D)
Nitrogen and sulphur done
clear
E)
All of the above done
clear
View Solution play_arrow
question_answer 51)
In Lassaigne?s test the organic compound is fused with Na followed by extraction with distilled water. Which of the following is not the possible product of this fusion reaction [AMU 2002]
A)
NaX done
clear
B)
\[NaCN\] done
clear
C)
NaNC done
clear
D)
\[N{{a}_{2}}S\] done
clear
View Solution play_arrow
question_answer 52)
The Empirical formula of a compound is \[C{{H}_{2}}O\] and its molecular weight is 120. The molecular formula of the compound is [Kerala (Med.) 2003]
A)
\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\] done
clear
B)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
C)
\[{{C}_{4}}{{H}_{8}}{{O}_{4}}\] done
clear
D)
\[C{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 53)
In Victor Mayer?s method 0.2 gm of an organic substance displaced 56 ml of air at STP the molecular weight of the compound [Kerala (Med.) 2003]
A)
56 done
clear
B)
112 done
clear
C)
80 done
clear
D)
28 done
clear
View Solution play_arrow
question_answer 54)
If we want to study relative arrangement of atoms in a molecule we study [Orissa JEE 2003]
A)
Empirical formula done
clear
B)
Molecular formula done
clear
C)
Structural formula done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 55)
Which one of the following reagents is used for detection of unsaturation in alkenes [EAMCET 2003]
A)
\[NaOH+CaO\] done
clear
B)
Cold dilute alkaline \[KMn{{O}_{4}}\] done
clear
C)
\[C{{l}_{2}}/hv\] done
clear
D)
\[KOH/{{C}_{2}}{{H}_{5}}OH\] done
clear
View Solution play_arrow
question_answer 56)
The decomposition of organic compounds in the presence of oxygen and without formation of odoriferous substances, is called [CBSE PMT 1999]
A)
Decay done
clear
B)
\[{{N}_{2}}\] fixation done
clear
C)
Nitrification done
clear
D)
Denitrification done
clear
View Solution play_arrow
question_answer 57)
Which of the following compounds is used as a refrigerants [Bihar CEE 1995]
A)
\[N{{H}_{3}}\] done
clear
B)
\[C{{H}_{2}}{{F}_{2}}\] done
clear
C)
\[CC{{l}_{4}}\] done
clear
D)
\[C{{H}_{3}}COON{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 58)
The latest technique for the purification of organic compounds is [Pb. CET 2001]
A)
Fractional distillation done
clear
B)
Chromatography done
clear
C)
Vacuum distillation done
clear
D)
Crystallisation done
clear
View Solution play_arrow
question_answer 59)
The presence of halogen, in an organic compounds, is detected by [Pb. CET 2002]
A)
Iodoform test done
clear
B)
Silver nitrate test done
clear
C)
Beilstein?s test done
clear
D)
Millon?s test done
clear
View Solution play_arrow
question_answer 60)
p-nitrophenol and o-nitrophenol are separated by [BVP 2004]
A)
Crystallisation done
clear
B)
Fractional crystallisation done
clear
C)
Distillation done
clear
D)
Steam distillation done
clear
View Solution play_arrow
question_answer 61)
Nitrating mixture is [MH CET 2004]
A)
Fuming nitric acid done
clear
B)
Mixture of conc. \[{{H}_{2}}S{{O}_{4}}\] and conc. \[HN{{O}_{3}}\] done
clear
C)
Mixture of nitric acid and anhydrous zinc chloride done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 62)
Quantitative measurement of nitrogen in an organic compounds is done by the method [CPMT 2004]
A)
Berthelot method done
clear
B)
Belstein method done
clear
C)
Lassaigne test done
clear
D)
Kjheldahl's method done
clear
View Solution play_arrow
question_answer 63)
Which kind of fission is favoured by sunlight [CPMT 2004]
A)
Heterolytic fission done
clear
B)
Homolytic fission done
clear
C)
Both A and B done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 64)
The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. The organic compound is [AIEEE 2004]
A)
Urea done
clear
B)
Benzamide done
clear
C)
Acetamide done
clear
D)
Thiourea done
clear
View Solution play_arrow
question_answer 65)
The best method for the separation of naphthalene and benzoic acid from their mixture is [CBSE PMT 2005]
A)
Chromatography done
clear
B)
Crystallisation done
clear
C)
Distillation done
clear
D)
Sublimation done
clear
View Solution play_arrow
question_answer 66)
A compound has an empirical formula \[{{C}_{2}}{{H}_{4}}O\]. An independent analysis gave a value of 132.16 for its molecular mass. What is the correct molecular formula [Kerala PMT 2004]
A)
\[{{C}_{4}}{{H}_{4}}{{O}_{5}}\] done
clear
B)
\[{{C}_{10}}{{H}_{12}}\] done
clear
C)
\[{{C}_{7}}{{O}_{3}}\] done
clear
D)
\[{{C}_{6}}{{H}_{12}}{{O}_{3}}\] done
clear
E)
\[{{C}_{4}}{{H}_{8}}{{O}_{5}}\] done
clear
View Solution play_arrow
question_answer 67)
An organic compound has an empirical formula \[C{{H}_{2}}O\], its vapour density is 45. The molecular formula of the compounds is [DCE 2004]
A)
\[C{{H}_{2}}O\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}O\] done
clear
C)
\[{{C}_{2}}{{H}_{2}}O\] done
clear
D)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] done
clear
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question_answer 68)
The study of organic compounds even at present is done separate from other compounds because [CPMT 1986]
A)
The formation of organic compounds is not based on chemical combination done
clear
B)
Organic compounds are covalent done
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C)
Catenation is the main characteristics done
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D)
It is the easiest method of study done
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question_answer 69)
Which of the following pair of the species has the same percentage of carbon [BHU 1999]
A)
\[C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{\overset{\,C{{H}_{3}}C{{H}_{2}}\,\,\,\,}{\mathop{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C\,\,\,\,\,\,\,\,-\,\,\,\,\,\,}}}\,}}\,\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,}}\,\,\,\,\,\,\,}{\mathop{CH\,-\,}}\,C{{H}_{2}}-{{(C{{H}_{2}})}_{2}}-C{{H}_{3}}\] and \[{{C}_{2}}{{H}_{5}}OH\] done
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B)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] and \[{{C}_{12}}{{H}_{22}}{{O}_{11}}\] done
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C)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] and \[{{C}_{12}}{{O}_{22}}{{O}_{11}}\] done
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D)
\[{{C}_{12}}{{O}_{22}}{{O}_{11}}\] and \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] done
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question_answer 70)
In Kjeldahl?s method of estimation of N,\[CuS{{O}_{4}}\]acts as [DCE 2002]
A)
Oxidising agent done
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B)
Reducing agent done
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C)
Catalytic agent done
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D)
Hydrolysis agent done
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question_answer 71)
An organic compound having molecular mass 60 is found to contain C = 20%, H= 6.67% and N=46.67% while rest is oxygen. On heating it gives \[N{{H}_{3}}\] alongwith a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. the compound is [AIEEE 2005]
A)
\[C{{H}_{3}}NCO\] done
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B)
\[C{{H}_{3}}CON{{H}_{2}}\] done
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C)
\[{{(N{{H}_{2}})}_{2}}CO\] done
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D)
\[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\] done
clear
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question_answer 72)
How will you separate a solution (miscible) of benzene \[+CHC{{l}_{3}}\] [AFMC 2005]
A)
Sublimation done
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B)
Filtration done
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C)
Distillation done
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D)
Crystallisation done
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question_answer 73)
A mixture of camphor and benzoic acid can be separated by [BHU 2005]
A)
Chemical method done
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B)
Sublimation done
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C)
Fractional distillation done
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D)
Extraction with a solvent done
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question_answer 74)
Dumas method involves the determination of nitrogen content in the organic compound in the form of [BHU 2005]
A)
NH3 done
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B)
N2 done
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C)
NaCN done
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D)
(NH4)2SO4 done
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question_answer 75)
When 32.25gm ethyl chloride dehydro halogenated, if gives 50%. Alkene, what is the mass of product. (atomic mass of chlorine = 35.5) [Kerala CET 2005]
A)
14 gm done
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B)
28 gm done
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C)
64.5 gm done
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D)
56 gm done
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E)
7 gm done
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question_answer 76)
How much sulphur is present in organic compound if on analysis 0.53 gm of this compound gives 1.158 gm of \[BaS{{O}_{4}}\] [Kerala CET 2005]
A)
10% done
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B)
15% done
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C)
20% done
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D)
25% done
clear
E)
30% done
clear
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